General Information:
Origin: China| Items | Standard |
| Characteristics | A white or almost white crystalline powder |
| Solubility | Sparingly soluble in water, freely soluble in alcohol,very slightly soluble in ether |
| Identification | Conforms |
| Melting range | 168-172 ºC |
| Chloride | ≤0.014% |
| Sulphate | ≤0.02% |
| Sulfide | No coloration or spotting occurs |
| Readily Carbonisable Substance | Conforms |
| Free P-aminophenol | ≤0.005% |
| Related substance | Conforms |
| Loss on drying | ≤ 0.5% |
| Residue on ignition | ≤0.1% |
| OVI | Meets the requirements |
| Assay | 99.0-101.0% |
| Heavy metals | ≤0.001% |